code: def gen_uid(cls, session_id: str):
      return f"custom_log_{session_id}"
  
file_path: mars/mars/services/session/supervisor/custom_log.py
imports: import os.path
  from collections import defaultdict
  from typing import Dict, Tuple
  from ....None import oscar
label_desc: Use image node_id 2 for calling the CustomLogMetaActor obj's underlying member method code with example usage: obj.gen_uid(cls, session_id) and returns: str, session_id